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Expired Canadian patentCanada

Belt filter press and belt for same

CA 1291361 C · Owner: Put, Frederik W. · Inventors: Put, Frederik W.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Belt filter press and belt for same A belt filter press comprising two co-operating endless belts, particularly for manure which according to, the invention takes steps to enable liquid and solid substance to be better separated from each other. The pressure between the endless belts is increased the, longitudinal edges are sufficiently sealed and substance that is still too moist is subjected repeatedly to compression since it remains stuck to the upper endless belt and is carried to the intake of the belts.

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted October 29, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 29, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 12, 1986
GrantedOctober 29, 1991
Term endedOctober 29, 2008
Patent numberCA 1291361 C
Classification (IPC)B30B9/24

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedNov 12, 1986Patent grantedOct 29, 1991Term endedOct 29, 2008

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.